2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <net/mac80211.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/netdevice.h>
15 #include <linux/types.h>
16 #include <linux/slab.h>
17 #include <linux/skbuff.h>
18 #include <linux/etherdevice.h>
19 #include <linux/if_arp.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/bitmap.h>
22 #include <linux/pm_qos.h>
23 #include <linux/inetdevice.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
27 #include "ieee80211_i.h"
28 #include "driver-ops.h"
36 static struct lock_class_key ieee80211_rx_skb_queue_class
;
38 void ieee80211_configure_filter(struct ieee80211_local
*local
)
41 unsigned int changed_flags
;
42 unsigned int new_flags
= 0;
44 if (atomic_read(&local
->iff_promiscs
))
45 new_flags
|= FIF_PROMISC_IN_BSS
;
47 if (atomic_read(&local
->iff_allmultis
))
48 new_flags
|= FIF_ALLMULTI
;
50 if (local
->monitors
|| local
->scanning
)
51 new_flags
|= FIF_BCN_PRBRESP_PROMISC
;
53 if (local
->fif_probe_req
|| local
->probe_req_reg
)
54 new_flags
|= FIF_PROBE_REQ
;
56 if (local
->fif_fcsfail
)
57 new_flags
|= FIF_FCSFAIL
;
59 if (local
->fif_plcpfail
)
60 new_flags
|= FIF_PLCPFAIL
;
62 if (local
->fif_control
)
63 new_flags
|= FIF_CONTROL
;
65 if (local
->fif_other_bss
)
66 new_flags
|= FIF_OTHER_BSS
;
68 if (local
->fif_pspoll
)
69 new_flags
|= FIF_PSPOLL
;
71 spin_lock_bh(&local
->filter_lock
);
72 changed_flags
= local
->filter_flags
^ new_flags
;
74 mc
= drv_prepare_multicast(local
, &local
->mc_list
);
75 spin_unlock_bh(&local
->filter_lock
);
80 drv_configure_filter(local
, changed_flags
, &new_flags
, mc
);
82 WARN_ON(new_flags
& (1<<31));
84 local
->filter_flags
= new_flags
& ~(1<<31);
87 static void ieee80211_reconfig_filter(struct work_struct
*work
)
89 struct ieee80211_local
*local
=
90 container_of(work
, struct ieee80211_local
, reconfig_filter
);
92 ieee80211_configure_filter(local
);
96 * Returns true if we are logically configured to be on
97 * the operating channel AND the hardware-conf is currently
98 * configured on the operating channel. Compares channel-type
101 bool ieee80211_cfg_on_oper_channel(struct ieee80211_local
*local
)
103 struct ieee80211_channel
*chan
;
104 enum nl80211_channel_type channel_type
;
106 /* This logic needs to match logic in ieee80211_hw_config */
107 if (local
->scan_channel
) {
108 chan
= local
->scan_channel
;
109 /* If scanning on oper channel, use whatever channel-type
110 * is currently in use.
112 if (chan
== local
->oper_channel
)
113 channel_type
= local
->_oper_channel_type
;
115 channel_type
= NL80211_CHAN_NO_HT
;
116 } else if (local
->tmp_channel
) {
117 chan
= local
->tmp_channel
;
118 channel_type
= local
->tmp_channel_type
;
120 chan
= local
->oper_channel
;
121 channel_type
= local
->_oper_channel_type
;
124 if (chan
!= local
->oper_channel
||
125 channel_type
!= local
->_oper_channel_type
)
128 /* Check current hardware-config against oper_channel. */
129 if (local
->oper_channel
!= local
->hw
.conf
.channel
||
130 local
->_oper_channel_type
!= local
->hw
.conf
.channel_type
)
136 int ieee80211_hw_config(struct ieee80211_local
*local
, u32 changed
)
138 struct ieee80211_channel
*chan
;
141 enum nl80211_channel_type channel_type
;
146 /* If this off-channel logic ever changes, ieee80211_on_oper_channel
147 * may need to change as well.
149 offchannel_flag
= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
150 if (local
->scan_channel
) {
151 chan
= local
->scan_channel
;
152 /* If scanning on oper channel, use whatever channel-type
153 * is currently in use.
155 if (chan
== local
->oper_channel
)
156 channel_type
= local
->_oper_channel_type
;
158 channel_type
= NL80211_CHAN_NO_HT
;
159 } else if (local
->tmp_channel
) {
160 chan
= local
->tmp_channel
;
161 channel_type
= local
->tmp_channel_type
;
163 chan
= local
->oper_channel
;
164 channel_type
= local
->_oper_channel_type
;
167 if (chan
!= local
->oper_channel
||
168 channel_type
!= local
->_oper_channel_type
)
169 local
->hw
.conf
.flags
|= IEEE80211_CONF_OFFCHANNEL
;
171 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_OFFCHANNEL
;
173 offchannel_flag
^= local
->hw
.conf
.flags
& IEEE80211_CONF_OFFCHANNEL
;
175 if (offchannel_flag
|| chan
!= local
->hw
.conf
.channel
||
176 channel_type
!= local
->hw
.conf
.channel_type
) {
177 local
->hw
.conf
.channel
= chan
;
178 local
->hw
.conf
.channel_type
= channel_type
;
179 changed
|= IEEE80211_CONF_CHANGE_CHANNEL
;
182 if (!conf_is_ht(&local
->hw
.conf
)) {
184 * mac80211.h documents that this is only valid
185 * when the channel is set to an HT type, and
186 * that otherwise STATIC is used.
188 local
->hw
.conf
.smps_mode
= IEEE80211_SMPS_STATIC
;
189 } else if (local
->hw
.conf
.smps_mode
!= local
->smps_mode
) {
190 local
->hw
.conf
.smps_mode
= local
->smps_mode
;
191 changed
|= IEEE80211_CONF_CHANGE_SMPS
;
194 if ((local
->scanning
& SCAN_SW_SCANNING
) ||
195 (local
->scanning
& SCAN_HW_SCANNING
))
196 power
= chan
->max_power
;
198 power
= local
->power_constr_level
?
199 (chan
->max_power
- local
->power_constr_level
) :
202 if (local
->user_power_level
>= 0)
203 power
= min(power
, local
->user_power_level
);
205 if (local
->hw
.conf
.power_level
!= power
) {
206 changed
|= IEEE80211_CONF_CHANGE_POWER
;
207 local
->hw
.conf
.power_level
= power
;
210 if (changed
&& local
->open_count
) {
211 ret
= drv_config(local
, changed
);
214 * HW reconfiguration should never fail, the driver has told
215 * us what it can support so it should live up to that promise.
218 * rfkill is not integrated with mac80211 and a
219 * configuration command can thus fail if hardware rfkill
222 * FIXME: integrate rfkill with mac80211 and then add this
232 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data
*sdata
,
235 struct ieee80211_local
*local
= sdata
->local
;
236 static const u8 zero
[ETH_ALEN
] = { 0 };
241 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
243 * While not associated, claim a BSSID of all-zeroes
244 * so that drivers don't do any weird things with the
245 * BSSID at that time.
247 if (sdata
->vif
.bss_conf
.assoc
)
248 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
250 sdata
->vif
.bss_conf
.bssid
= zero
;
251 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
252 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
253 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
254 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
255 else if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
)
256 sdata
->vif
.bss_conf
.bssid
= NULL
;
257 else if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
258 sdata
->vif
.bss_conf
.bssid
= zero
;
264 switch (sdata
->vif
.type
) {
265 case NL80211_IFTYPE_AP
:
266 case NL80211_IFTYPE_ADHOC
:
267 case NL80211_IFTYPE_WDS
:
268 case NL80211_IFTYPE_MESH_POINT
:
271 /* do not warn to simplify caller in scan.c */
272 changed
&= ~BSS_CHANGED_BEACON_ENABLED
;
273 if (WARN_ON(changed
& BSS_CHANGED_BEACON
))
278 if (changed
& BSS_CHANGED_BEACON_ENABLED
) {
279 if (local
->quiescing
|| !ieee80211_sdata_running(sdata
) ||
280 test_bit(SDATA_STATE_OFFCHANNEL
, &sdata
->state
)) {
281 sdata
->vif
.bss_conf
.enable_beacon
= false;
284 * Beacon should be enabled, but AP mode must
285 * check whether there is a beacon configured.
287 switch (sdata
->vif
.type
) {
288 case NL80211_IFTYPE_AP
:
289 sdata
->vif
.bss_conf
.enable_beacon
=
290 !!sdata
->u
.ap
.beacon
;
292 case NL80211_IFTYPE_ADHOC
:
293 sdata
->vif
.bss_conf
.enable_beacon
=
294 !!sdata
->u
.ibss
.presp
;
296 #ifdef CONFIG_MAC80211_MESH
297 case NL80211_IFTYPE_MESH_POINT
:
298 sdata
->vif
.bss_conf
.enable_beacon
=
299 !!sdata
->u
.mesh
.mesh_id_len
;
310 drv_bss_info_changed(local
, sdata
, &sdata
->vif
.bss_conf
, changed
);
313 u32
ieee80211_reset_erp_info(struct ieee80211_sub_if_data
*sdata
)
315 sdata
->vif
.bss_conf
.use_cts_prot
= false;
316 sdata
->vif
.bss_conf
.use_short_preamble
= false;
317 sdata
->vif
.bss_conf
.use_short_slot
= false;
318 return BSS_CHANGED_ERP_CTS_PROT
|
319 BSS_CHANGED_ERP_PREAMBLE
|
320 BSS_CHANGED_ERP_SLOT
;
323 static void ieee80211_tasklet_handler(unsigned long data
)
325 struct ieee80211_local
*local
= (struct ieee80211_local
*) data
;
326 struct sta_info
*sta
, *tmp
;
327 struct skb_eosp_msg_data
*eosp_data
;
330 while ((skb
= skb_dequeue(&local
->skb_queue
)) ||
331 (skb
= skb_dequeue(&local
->skb_queue_unreliable
))) {
332 switch (skb
->pkt_type
) {
333 case IEEE80211_RX_MSG
:
334 /* Clear skb->pkt_type in order to not confuse kernel
337 ieee80211_rx(local_to_hw(local
), skb
);
339 case IEEE80211_TX_STATUS_MSG
:
341 ieee80211_tx_status(local_to_hw(local
), skb
);
343 case IEEE80211_EOSP_MSG
:
344 eosp_data
= (void *)skb
->cb
;
345 for_each_sta_info(local
, eosp_data
->sta
, sta
, tmp
) {
346 /* skip wrong virtual interface */
347 if (memcmp(eosp_data
->iface
,
348 sta
->sdata
->vif
.addr
, ETH_ALEN
))
350 clear_sta_flag(sta
, WLAN_STA_SP
);
356 WARN(1, "mac80211: Packet is of unknown type %d\n",
364 static void ieee80211_restart_work(struct work_struct
*work
)
366 struct ieee80211_local
*local
=
367 container_of(work
, struct ieee80211_local
, restart_work
);
369 /* wait for scan work complete */
370 flush_workqueue(local
->workqueue
);
372 mutex_lock(&local
->mtx
);
373 WARN(test_bit(SCAN_HW_SCANNING
, &local
->scanning
) ||
374 local
->sched_scanning
,
375 "%s called with hardware scan in progress\n", __func__
);
376 mutex_unlock(&local
->mtx
);
379 ieee80211_scan_cancel(local
);
380 ieee80211_reconfig(local
);
384 void ieee80211_restart_hw(struct ieee80211_hw
*hw
)
386 struct ieee80211_local
*local
= hw_to_local(hw
);
388 trace_api_restart_hw(local
);
390 wiphy_info(hw
->wiphy
,
391 "Hardware restart was requested\n");
393 /* use this reason, ieee80211_reconfig will unblock it */
394 ieee80211_stop_queues_by_reason(hw
,
395 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
397 schedule_work(&local
->restart_work
);
399 EXPORT_SYMBOL(ieee80211_restart_hw
);
401 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
403 struct ieee80211_local
*local
=
404 container_of(work
, struct ieee80211_local
, recalc_smps
);
406 mutex_lock(&local
->iflist_mtx
);
407 ieee80211_recalc_smps(local
);
408 mutex_unlock(&local
->iflist_mtx
);
412 static int ieee80211_ifa_changed(struct notifier_block
*nb
,
413 unsigned long data
, void *arg
)
415 struct in_ifaddr
*ifa
= arg
;
416 struct ieee80211_local
*local
=
417 container_of(nb
, struct ieee80211_local
,
419 struct net_device
*ndev
= ifa
->ifa_dev
->dev
;
420 struct wireless_dev
*wdev
= ndev
->ieee80211_ptr
;
421 struct in_device
*idev
;
422 struct ieee80211_sub_if_data
*sdata
;
423 struct ieee80211_bss_conf
*bss_conf
;
424 struct ieee80211_if_managed
*ifmgd
;
427 /* Make sure it's our interface that got changed */
431 if (wdev
->wiphy
!= local
->hw
.wiphy
)
434 sdata
= IEEE80211_DEV_TO_SUB_IF(ndev
);
435 bss_conf
= &sdata
->vif
.bss_conf
;
437 if (!ieee80211_sdata_running(sdata
))
440 /* ARP filtering is only supported in managed mode */
441 if (sdata
->vif
.type
!= NL80211_IFTYPE_STATION
)
444 idev
= __in_dev_get_rtnl(sdata
->dev
);
448 ifmgd
= &sdata
->u
.mgd
;
449 mutex_lock(&ifmgd
->mtx
);
451 /* Copy the addresses to the bss_conf list */
452 ifa
= idev
->ifa_list
;
453 while (c
< IEEE80211_BSS_ARP_ADDR_LIST_LEN
&& ifa
) {
454 bss_conf
->arp_addr_list
[c
] = ifa
->ifa_address
;
459 /* If not all addresses fit the list, disable filtering */
461 sdata
->arp_filter_state
= false;
464 sdata
->arp_filter_state
= true;
466 bss_conf
->arp_addr_cnt
= c
;
468 /* Configure driver only if associated */
469 if (ifmgd
->associated
) {
470 bss_conf
->arp_filter_enabled
= sdata
->arp_filter_state
;
471 ieee80211_bss_info_change_notify(sdata
,
472 BSS_CHANGED_ARP_FILTER
);
475 mutex_unlock(&ifmgd
->mtx
);
481 static int ieee80211_napi_poll(struct napi_struct
*napi
, int budget
)
483 struct ieee80211_local
*local
=
484 container_of(napi
, struct ieee80211_local
, napi
);
486 return local
->ops
->napi_poll(&local
->hw
, budget
);
489 void ieee80211_napi_schedule(struct ieee80211_hw
*hw
)
491 struct ieee80211_local
*local
= hw_to_local(hw
);
493 napi_schedule(&local
->napi
);
495 EXPORT_SYMBOL(ieee80211_napi_schedule
);
497 void ieee80211_napi_complete(struct ieee80211_hw
*hw
)
499 struct ieee80211_local
*local
= hw_to_local(hw
);
501 napi_complete(&local
->napi
);
503 EXPORT_SYMBOL(ieee80211_napi_complete
);
505 /* There isn't a lot of sense in it, but you can transmit anything you like */
506 static const struct ieee80211_txrx_stypes
507 ieee80211_default_mgmt_stypes
[NUM_NL80211_IFTYPES
] = {
508 [NL80211_IFTYPE_ADHOC
] = {
510 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4),
512 [NL80211_IFTYPE_STATION
] = {
514 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
515 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
517 [NL80211_IFTYPE_AP
] = {
519 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
520 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
521 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
522 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
523 BIT(IEEE80211_STYPE_AUTH
>> 4) |
524 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
525 BIT(IEEE80211_STYPE_ACTION
>> 4),
527 [NL80211_IFTYPE_AP_VLAN
] = {
530 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
531 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
532 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
533 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
534 BIT(IEEE80211_STYPE_AUTH
>> 4) |
535 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
536 BIT(IEEE80211_STYPE_ACTION
>> 4),
538 [NL80211_IFTYPE_P2P_CLIENT
] = {
540 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
541 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4),
543 [NL80211_IFTYPE_P2P_GO
] = {
545 .rx
= BIT(IEEE80211_STYPE_ASSOC_REQ
>> 4) |
546 BIT(IEEE80211_STYPE_REASSOC_REQ
>> 4) |
547 BIT(IEEE80211_STYPE_PROBE_REQ
>> 4) |
548 BIT(IEEE80211_STYPE_DISASSOC
>> 4) |
549 BIT(IEEE80211_STYPE_AUTH
>> 4) |
550 BIT(IEEE80211_STYPE_DEAUTH
>> 4) |
551 BIT(IEEE80211_STYPE_ACTION
>> 4),
553 [NL80211_IFTYPE_MESH_POINT
] = {
555 .rx
= BIT(IEEE80211_STYPE_ACTION
>> 4) |
556 BIT(IEEE80211_STYPE_AUTH
>> 4) |
557 BIT(IEEE80211_STYPE_DEAUTH
>> 4),
561 struct ieee80211_hw
*ieee80211_alloc_hw(size_t priv_data_len
,
562 const struct ieee80211_ops
*ops
)
564 struct ieee80211_local
*local
;
568 /* Ensure 32-byte alignment of our private data and hw private data.
569 * We use the wiphy priv data for both our ieee80211_local and for
570 * the driver's private data
572 * In memory it'll be like this:
574 * +-------------------------+
576 * +-------------------------+
577 * | struct ieee80211_local |
578 * +-------------------------+
579 * | driver's private data |
580 * +-------------------------+
583 priv_size
= ALIGN(sizeof(*local
), NETDEV_ALIGN
) + priv_data_len
;
585 wiphy
= wiphy_new(&mac80211_config_ops
, priv_size
);
590 wiphy
->mgmt_stypes
= ieee80211_default_mgmt_stypes
;
592 wiphy
->privid
= mac80211_wiphy_privid
;
594 wiphy
->flags
|= WIPHY_FLAG_NETNS_OK
|
595 WIPHY_FLAG_4ADDR_AP
|
596 WIPHY_FLAG_4ADDR_STATION
|
597 WIPHY_FLAG_REPORTS_OBSS
;
600 wiphy
->flags
|= WIPHY_FLAG_IBSS_RSN
;
602 wiphy
->bss_priv_size
= sizeof(struct ieee80211_bss
);
604 local
= wiphy_priv(wiphy
);
606 local
->hw
.wiphy
= wiphy
;
608 local
->hw
.priv
= (char *)local
+ ALIGN(sizeof(*local
), NETDEV_ALIGN
);
613 BUG_ON(!ops
->config
);
614 BUG_ON(!ops
->add_interface
);
615 BUG_ON(!ops
->remove_interface
);
616 BUG_ON(!ops
->configure_filter
);
619 /* set up some defaults */
620 local
->hw
.queues
= 1;
621 local
->hw
.max_rates
= 1;
622 local
->hw
.max_report_rates
= 0;
623 local
->hw
.max_rx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
624 local
->hw
.max_tx_aggregation_subframes
= IEEE80211_MAX_AMPDU_BUF
;
625 local
->hw
.conf
.long_frame_max_tx_count
= wiphy
->retry_long
;
626 local
->hw
.conf
.short_frame_max_tx_count
= wiphy
->retry_short
;
627 local
->user_power_level
= -1;
628 local
->uapsd_queues
= IEEE80211_DEFAULT_UAPSD_QUEUES
;
629 local
->uapsd_max_sp_len
= IEEE80211_DEFAULT_MAX_SP_LEN
;
631 INIT_LIST_HEAD(&local
->interfaces
);
633 __hw_addr_init(&local
->mc_list
);
635 mutex_init(&local
->iflist_mtx
);
636 mutex_init(&local
->mtx
);
638 mutex_init(&local
->key_mtx
);
639 spin_lock_init(&local
->filter_lock
);
640 spin_lock_init(&local
->queue_stop_reason_lock
);
643 * The rx_skb_queue is only accessed from tasklets,
644 * but other SKB queues are used from within IRQ
645 * context. Therefore, this one needs a different
646 * locking class so our direct, non-irq-safe use of
647 * the queue's lock doesn't throw lockdep warnings.
649 skb_queue_head_init_class(&local
->rx_skb_queue
,
650 &ieee80211_rx_skb_queue_class
);
652 INIT_DELAYED_WORK(&local
->scan_work
, ieee80211_scan_work
);
654 ieee80211_work_init(local
);
656 INIT_WORK(&local
->restart_work
, ieee80211_restart_work
);
658 INIT_WORK(&local
->reconfig_filter
, ieee80211_reconfig_filter
);
659 INIT_WORK(&local
->recalc_smps
, ieee80211_recalc_smps_work
);
660 local
->smps_mode
= IEEE80211_SMPS_OFF
;
662 INIT_WORK(&local
->dynamic_ps_enable_work
,
663 ieee80211_dynamic_ps_enable_work
);
664 INIT_WORK(&local
->dynamic_ps_disable_work
,
665 ieee80211_dynamic_ps_disable_work
);
666 setup_timer(&local
->dynamic_ps_timer
,
667 ieee80211_dynamic_ps_timer
, (unsigned long) local
);
669 INIT_WORK(&local
->sched_scan_stopped_work
,
670 ieee80211_sched_scan_stopped_work
);
672 sta_info_init(local
);
674 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
675 skb_queue_head_init(&local
->pending
[i
]);
676 atomic_set(&local
->agg_queue_stop
[i
], 0);
678 tasklet_init(&local
->tx_pending_tasklet
, ieee80211_tx_pending
,
679 (unsigned long)local
);
681 tasklet_init(&local
->tasklet
,
682 ieee80211_tasklet_handler
,
683 (unsigned long) local
);
685 skb_queue_head_init(&local
->skb_queue
);
686 skb_queue_head_init(&local
->skb_queue_unreliable
);
688 /* init dummy netdev for use w/ NAPI */
689 init_dummy_netdev(&local
->napi_dev
);
691 ieee80211_led_names(local
);
693 ieee80211_hw_roc_setup(local
);
695 return local_to_hw(local
);
697 EXPORT_SYMBOL(ieee80211_alloc_hw
);
699 int ieee80211_register_hw(struct ieee80211_hw
*hw
)
701 struct ieee80211_local
*local
= hw_to_local(hw
);
703 enum ieee80211_band band
;
704 int channels
, max_bitrates
;
706 static const u32 cipher_suites
[] = {
707 /* keep WEP first, it may be removed below */
708 WLAN_CIPHER_SUITE_WEP40
,
709 WLAN_CIPHER_SUITE_WEP104
,
710 WLAN_CIPHER_SUITE_TKIP
,
711 WLAN_CIPHER_SUITE_CCMP
,
713 /* keep last -- depends on hw flags! */
714 WLAN_CIPHER_SUITE_AES_CMAC
717 if ((hw
->wiphy
->wowlan
.flags
|| hw
->wiphy
->wowlan
.n_patterns
)
719 && (!local
->ops
->suspend
|| !local
->ops
->resume
)
724 if (hw
->max_report_rates
== 0)
725 hw
->max_report_rates
= hw
->max_rates
;
728 * generic code guarantees at least one band,
729 * set this very early because much code assumes
730 * that hw.conf.channel is assigned
735 for (band
= 0; band
< IEEE80211_NUM_BANDS
; band
++) {
736 struct ieee80211_supported_band
*sband
;
738 sband
= local
->hw
.wiphy
->bands
[band
];
741 if (!local
->oper_channel
) {
742 /* init channel we're on */
743 local
->hw
.conf
.channel
=
744 local
->oper_channel
= &sband
->channels
[0];
745 local
->hw
.conf
.channel_type
= NL80211_CHAN_NO_HT
;
747 channels
+= sband
->n_channels
;
749 if (max_bitrates
< sband
->n_bitrates
)
750 max_bitrates
= sband
->n_bitrates
;
751 supp_ht
= supp_ht
|| sband
->ht_cap
.ht_supported
;
754 local
->int_scan_req
= kzalloc(sizeof(*local
->int_scan_req
) +
755 sizeof(void *) * channels
, GFP_KERNEL
);
756 if (!local
->int_scan_req
)
759 /* if low-level driver supports AP, we also support VLAN */
760 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_AP
)) {
761 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
762 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_AP_VLAN
);
765 /* mac80211 always supports monitor */
766 hw
->wiphy
->interface_modes
|= BIT(NL80211_IFTYPE_MONITOR
);
767 hw
->wiphy
->software_iftypes
|= BIT(NL80211_IFTYPE_MONITOR
);
770 * mac80211 doesn't support more than 1 channel, and also not more
771 * than one IBSS interface
773 for (i
= 0; i
< hw
->wiphy
->n_iface_combinations
; i
++) {
774 const struct ieee80211_iface_combination
*c
;
777 c
= &hw
->wiphy
->iface_combinations
[i
];
779 if (c
->num_different_channels
> 1)
782 for (j
= 0; j
< c
->n_limits
; j
++)
783 if ((c
->limits
[j
].types
& BIT(NL80211_IFTYPE_ADHOC
)) &&
784 c
->limits
[j
].max
> 1)
788 #ifndef CONFIG_MAC80211_MESH
789 /* mesh depends on Kconfig, but drivers should set it if they want */
790 local
->hw
.wiphy
->interface_modes
&= ~BIT(NL80211_IFTYPE_MESH_POINT
);
793 /* if the underlying driver supports mesh, mac80211 will (at least)
794 * provide routing of mesh authentication frames to userspace */
795 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_MESH_POINT
))
796 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_MESH_AUTH
;
798 /* mac80211 supports control port protocol changing */
799 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_CONTROL_PORT_PROTOCOL
;
801 if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_DBM
)
802 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_MBM
;
803 else if (local
->hw
.flags
& IEEE80211_HW_SIGNAL_UNSPEC
)
804 local
->hw
.wiphy
->signal_type
= CFG80211_SIGNAL_TYPE_UNSPEC
;
806 WARN((local
->hw
.flags
& IEEE80211_HW_SUPPORTS_UAPSD
)
807 && (local
->hw
.flags
& IEEE80211_HW_PS_NULLFUNC_STACK
),
808 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n");
811 * Calculate scan IE length -- we need this to alloc
812 * memory and to subtract from the driver limit. It
813 * includes the DS Params, (extended) supported rates, and HT
814 * information -- SSID is the driver's responsibility.
816 local
->scan_ies_len
= 4 + max_bitrates
/* (ext) supp rates */ +
819 local
->scan_ies_len
+= 2 + sizeof(struct ieee80211_ht_cap
);
821 if (!local
->ops
->hw_scan
) {
822 /* For hw_scan, driver needs to set these up. */
823 local
->hw
.wiphy
->max_scan_ssids
= 4;
824 local
->hw
.wiphy
->max_scan_ie_len
= IEEE80211_MAX_DATA_LEN
;
828 * If the driver supports any scan IEs, then assume the
829 * limit includes the IEs mac80211 will add, otherwise
830 * leave it at zero and let the driver sort it out; we
831 * still pass our IEs to the driver but userspace will
832 * not be allowed to in that case.
834 if (local
->hw
.wiphy
->max_scan_ie_len
)
835 local
->hw
.wiphy
->max_scan_ie_len
-= local
->scan_ies_len
;
837 /* Set up cipher suites unless driver already did */
838 if (!local
->hw
.wiphy
->cipher_suites
) {
839 local
->hw
.wiphy
->cipher_suites
= cipher_suites
;
840 local
->hw
.wiphy
->n_cipher_suites
= ARRAY_SIZE(cipher_suites
);
841 if (!(local
->hw
.flags
& IEEE80211_HW_MFP_CAPABLE
))
842 local
->hw
.wiphy
->n_cipher_suites
--;
844 if (IS_ERR(local
->wep_tx_tfm
) || IS_ERR(local
->wep_rx_tfm
)) {
845 if (local
->hw
.wiphy
->cipher_suites
== cipher_suites
) {
846 local
->hw
.wiphy
->cipher_suites
+= 2;
847 local
->hw
.wiphy
->n_cipher_suites
-= 2;
855 local
->hw
.wiphy
->cipher_suites
,
856 sizeof(u32
) * local
->hw
.wiphy
->n_cipher_suites
,
860 for (r
= 0; r
< local
->hw
.wiphy
->n_cipher_suites
; r
++) {
861 u32 suite
= local
->hw
.wiphy
->cipher_suites
[r
];
862 if (suite
== WLAN_CIPHER_SUITE_WEP40
||
863 suite
== WLAN_CIPHER_SUITE_WEP104
)
867 local
->hw
.wiphy
->cipher_suites
= suites
;
868 local
->hw
.wiphy
->n_cipher_suites
= w
;
869 local
->wiphy_ciphers_allocated
= true;
873 if (!local
->ops
->remain_on_channel
)
874 local
->hw
.wiphy
->max_remain_on_channel_duration
= 5000;
876 if (local
->ops
->sched_scan_start
)
877 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_SUPPORTS_SCHED_SCAN
;
879 /* mac80211 based drivers don't support internal TDLS setup */
880 if (local
->hw
.wiphy
->flags
& WIPHY_FLAG_SUPPORTS_TDLS
)
881 local
->hw
.wiphy
->flags
|= WIPHY_FLAG_TDLS_EXTERNAL_SETUP
;
883 result
= wiphy_register(local
->hw
.wiphy
);
885 goto fail_wiphy_register
;
888 * We use the number of queues for feature tests (QoS, HT) internally
889 * so restrict them appropriately.
891 if (hw
->queues
> IEEE80211_MAX_QUEUES
)
892 hw
->queues
= IEEE80211_MAX_QUEUES
;
895 alloc_ordered_workqueue(wiphy_name(local
->hw
.wiphy
), 0);
896 if (!local
->workqueue
) {
902 * The hardware needs headroom for sending the frame,
903 * and we need some headroom for passing the frame to monitor
904 * interfaces, but never both at the same time.
906 local
->tx_headroom
= max_t(unsigned int , local
->hw
.extra_tx_headroom
,
907 IEEE80211_TX_STATUS_HEADROOM
);
909 debugfs_hw_add(local
);
912 * if the driver doesn't specify a max listen interval we
913 * use 5 which should be a safe default
915 if (local
->hw
.max_listen_interval
== 0)
916 local
->hw
.max_listen_interval
= 5;
918 local
->hw
.conf
.listen_interval
= local
->hw
.max_listen_interval
;
920 local
->dynamic_ps_forced_timeout
= -1;
922 result
= ieee80211_wep_init(local
);
924 wiphy_debug(local
->hw
.wiphy
, "Failed to initialize wep: %d\n",
929 result
= ieee80211_init_rate_ctrl_alg(local
,
930 hw
->rate_control_algorithm
);
932 wiphy_debug(local
->hw
.wiphy
,
933 "Failed to initialize rate control algorithm\n");
937 /* add one default STA interface if supported */
938 if (local
->hw
.wiphy
->interface_modes
& BIT(NL80211_IFTYPE_STATION
)) {
939 result
= ieee80211_if_add(local
, "wlan%d", NULL
,
940 NL80211_IFTYPE_STATION
, NULL
);
942 wiphy_warn(local
->hw
.wiphy
,
943 "Failed to add default virtual iface\n");
948 ieee80211_led_init(local
);
950 local
->network_latency_notifier
.notifier_call
=
951 ieee80211_max_network_latency
;
952 result
= pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY
,
953 &local
->network_latency_notifier
);
960 local
->ifa_notifier
.notifier_call
= ieee80211_ifa_changed
;
961 result
= register_inetaddr_notifier(&local
->ifa_notifier
);
966 netif_napi_add(&local
->napi_dev
, &local
->napi
, ieee80211_napi_poll
,
967 local
->hw
.napi_weight
);
973 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
974 &local
->network_latency_notifier
);
978 ieee80211_led_exit(local
);
979 ieee80211_remove_interfaces(local
);
982 ieee80211_wep_free(local
);
983 sta_info_stop(local
);
984 destroy_workqueue(local
->workqueue
);
986 wiphy_unregister(local
->hw
.wiphy
);
988 if (local
->wiphy_ciphers_allocated
)
989 kfree(local
->hw
.wiphy
->cipher_suites
);
990 kfree(local
->int_scan_req
);
993 EXPORT_SYMBOL(ieee80211_register_hw
);
995 void ieee80211_unregister_hw(struct ieee80211_hw
*hw
)
997 struct ieee80211_local
*local
= hw_to_local(hw
);
999 tasklet_kill(&local
->tx_pending_tasklet
);
1000 tasklet_kill(&local
->tasklet
);
1002 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY
,
1003 &local
->network_latency_notifier
);
1005 unregister_inetaddr_notifier(&local
->ifa_notifier
);
1011 * At this point, interface list manipulations are fine
1012 * because the driver cannot be handing us frames any
1013 * more and the tasklet is killed.
1015 ieee80211_remove_interfaces(local
);
1020 * Now all work items will be gone, but the
1021 * timer might still be armed, so delete it
1023 del_timer_sync(&local
->work_timer
);
1025 cancel_work_sync(&local
->restart_work
);
1026 cancel_work_sync(&local
->reconfig_filter
);
1028 ieee80211_clear_tx_pending(local
);
1029 rate_control_deinitialize(local
);
1031 if (skb_queue_len(&local
->skb_queue
) ||
1032 skb_queue_len(&local
->skb_queue_unreliable
))
1033 wiphy_warn(local
->hw
.wiphy
, "skb_queue not empty\n");
1034 skb_queue_purge(&local
->skb_queue
);
1035 skb_queue_purge(&local
->skb_queue_unreliable
);
1036 skb_queue_purge(&local
->rx_skb_queue
);
1038 destroy_workqueue(local
->workqueue
);
1039 wiphy_unregister(local
->hw
.wiphy
);
1040 sta_info_stop(local
);
1041 ieee80211_wep_free(local
);
1042 ieee80211_led_exit(local
);
1043 kfree(local
->int_scan_req
);
1045 EXPORT_SYMBOL(ieee80211_unregister_hw
);
1047 void ieee80211_free_hw(struct ieee80211_hw
*hw
)
1049 struct ieee80211_local
*local
= hw_to_local(hw
);
1051 mutex_destroy(&local
->iflist_mtx
);
1052 mutex_destroy(&local
->mtx
);
1054 if (local
->wiphy_ciphers_allocated
)
1055 kfree(local
->hw
.wiphy
->cipher_suites
);
1057 wiphy_free(local
->hw
.wiphy
);
1059 EXPORT_SYMBOL(ieee80211_free_hw
);
1061 static int __init
ieee80211_init(void)
1063 struct sk_buff
*skb
;
1066 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info
) > sizeof(skb
->cb
));
1067 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info
, driver_data
) +
1068 IEEE80211_TX_INFO_DRIVER_DATA_SIZE
> sizeof(skb
->cb
));
1070 ret
= rc80211_minstrel_init();
1074 ret
= rc80211_minstrel_ht_init();
1078 ret
= rc80211_pid_init();
1082 ret
= ieee80211_iface_init();
1090 rc80211_minstrel_ht_exit();
1092 rc80211_minstrel_exit();
1097 static void __exit
ieee80211_exit(void)
1100 rc80211_minstrel_ht_exit();
1101 rc80211_minstrel_exit();
1106 ieee80211_iface_exit();
1112 subsys_initcall(ieee80211_init
);
1113 module_exit(ieee80211_exit
);
1115 MODULE_DESCRIPTION("IEEE 802.11 subsystem");
1116 MODULE_LICENSE("GPL");